Formaldehyde → Benzene, ethenyl-, polymer with 1,3-butadiene

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Reaction Steps

14.7 kg of Latex A-1, 3.21 kg of deionized water are charged into a 40 l reactor equipped with a stirrer, heating and cooling apparatus, and a raw material supplying tube. Then, 126 g of acetic anhydride and 3.1 kg of deionized water are added and mixed at 25° C. After stirring and mixing for about 1 minute, the mixture is allowed to stand for 30 minutes. Then, 90 g of the sodium salt of a condensate of beta-naphthalene sulfonic acid and formaldehyde; 180 g of potassium hydroxide and 1.5 kg of deionized water are added, while stirring. A butadiene/styrene copolymer rubber latex with an average particle size of 0.65 μm is obtained. The pH of the latex is 7.2 and the solid content is 27.3%.

Provenance & Evidence